County annual report · FIPS 46087
2015 McCook County, SD Power Outage Report
In 2015, customers in McCook County, SD went without power for an average of 0.7 hours, a total of 2,052 customer-hours (South Dakota average 0.7 hours). That ranks 4th worst of 10 South Dakota counties and 1979th of 2,484 nationally.
Compared with SD, the US
Coverage line is EAGLE-I's share of South Dakota customers tracked each year.
Biggest outages in McCook County, 2015
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 18, 2015 12:00 | August 18, 2015 15:15 | 3h 15m | 392 | 1,176 |
| 2 | December 16, 2015 20:00 | December 16, 2015 21:45 | 1h 45m | 392 | 588 |
| 3 | June 20, 2015 08:00 | June 20, 2015 10:30 | 2h 30m | 23 | 44 |
| 4 | September 25, 2015 18:00 | September 25, 2015 18:30 | 30m | 22 | 11 |
| 5 | June 22, 2015 11:15 | June 23, 2015 00:45 | 13h 30m | 15 | 118 |
| 6 | October 21, 2015 18:30 | October 21, 2015 19:30 | 1h | 11 | 11 |
| 7 | October 21, 2015 20:15 | October 21, 2015 22:00 | 1h 45m | 11 | 19 |
| 8 | July 25, 2015 20:45 | July 25, 2015 23:00 | 2h 15m | 3 | 6 |
| 9 | August 3, 2015 19:30 | August 3, 2015 23:15 | 3h 45m | 3 | 7 |
| 10 | August 16, 2015 22:45 | August 17, 2015 04:30 | 5h 45m | 3 | 12 |
Outage episodes by size in 2015: 2 reached 100+ customers, 0 reached 1,000+ customers, 0 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving McCook County reported on EIA Form 861 for 2015, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Northern States Power Co - Minnesota | 2015 | 2.1 hrs | 0.88 | 82 min | 0.81 |
| Sioux Valley SW Elec Coop | 2015 | 2.0 hrs | 1.29 | 2.0 hrs | 1.29 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Southeastern Electric Coop Inc - (SD) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of South Dakota's customers in 2015; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 3,102 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. McCook County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), McCook County, SD annual power outage report, 2015, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2015/south-dakota/mccook-county